The 2600 mAh Lithium-Ion Battery is a rechargeable battery commonly used in electronics, portable devices, and DIY projects. The “2600 mAh” (milliampere-hour) rating indicates the capacity of the battery — it can deliver 2600 mA of current for 1 hour, or proportionally lower current for longer time. 🔹 Details and Explanation Type: Rechargeable Lithium-Ion (Li-ion) cell Nominal Voltage: 3.6V – 3.7V per cell Full Charge Voltage: 4.2V Discharge Cutoff Voltage: Around 2.5V – 3.0V (below this can damage the battery) Capacity: 2600 mAh (varies slightly depending on manufacturer and usage conditions) Standard Size: Often available as 18650 cells (cylindrical: 18 mm diameter × 65 mm length) Recharge Cycles: 300–500 cycles (depending on care and charging method) 🔹 Working Principle Li-ion batteries store energy by moving lithium ions between the anode (graphite) and cathode (lithium metal oxide) during charging and discharging. When charging, lithium ions move from the cathode to the anode. When discharging, ions flow back to the cathode, generating current. 🔹 Safety Features Needs protection circuit (BMS/PCB) to prevent: Overcharging (above 4.2V) Over-discharging (below 2.5–3V) Overcurrent / short circuit Should always be charged using a CC/CV (constant current/constant voltage) charger, such as TP4056 module. 🔹 Applications Power banks Flashlights DIY electronics and robotics Laptops, cameras, and other portable devices Solar power storage systems